Предмет: Алгебра, автор: Маленькийг

(а+3)^2-2а(3-4а) упростите выражение и найдите его значение а=-13
помогите пожалуйста)

Ответы

Автор ответа: des11

0

$(a+3)^2-2a(3-4a) = a^2+6a+9-6a+8a^2 = 9a^2+9 \ 9(- frac{1}{3} )^2+9=1+9=10$

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